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Stitching function unit tests

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This commit is contained in:
Jakub Melka
2019-03-10 10:54:04 +01:00
parent 234b7c77f7
commit 214af0629d
3 changed files with 204 additions and 3 deletions
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83
PdfForQtLib/sources/pdffunction.cpp
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@ -229,6 +229,74 @@ PDFFunctionPtr PDFFunction::createFunctionImpl(const PDFDocument* document, cons
case 3:
{
// Stitching function
std::vector<PDFReal> bounds = loader.readNumberArrayFromDictionary(dictionary, "Bounds");
std::vector<PDFReal> encode = loader.readNumberArrayFromDictionary(dictionary, "Encode");
if (domain.size() != 2)
{
throw PDFParserException(PDFParsingContext::tr("Stitching function can have only one input value."));
}
if (dictionary->hasKey("Functions"))
{
const PDFObject& functions = document->getObject(dictionary->get("Functions"));
if (functions.isArray())
{
const PDFArray* array = functions.getArray();
if (array->getCount() != bounds.size() + 1)
{
throw PDFParserException(PDFParsingContext::tr("Stitching function has different function count. Expected %1, actual %2.").arg(array->getCount()).arg(bounds.size() + 1));
}
std::vector<PDFStitchingFunction::PartialFunction> partialFunctions;
partialFunctions.resize(array->getCount());
if (encode.size() != partialFunctions.size() * 2)
{
throw PDFParserException(PDFParsingContext::tr("Stitching function has invalid encode array. Expected %1 items, actual %2.").arg(partialFunctions.size() * 2).arg(encode.size()));
}
std::vector<PDFReal> boundsAdjusted;
boundsAdjusted.resize(bounds.size() + 2);
boundsAdjusted.front() = domain.front();
boundsAdjusted.back() = domain.back();
std::copy(bounds.cbegin(), bounds.cend(), std::next(boundsAdjusted.begin()));
Q_ASSERT(boundsAdjusted.size() == partialFunctions.size() + 1);
uint32_t n = 0;
for (size_t i = 0; i < partialFunctions.size(); ++i)
{
PDFStitchingFunction::PartialFunction& partialFunction = partialFunctions[i];
partialFunction.function = createFunctionImpl(document, array->getItem(i), context);
partialFunction.bound0 = boundsAdjusted[i];
partialFunction.bound1 = boundsAdjusted[i + 1];
partialFunction.encode0 = encode[2 * i];
partialFunction.encode1 = encode[2 * i + 1];
const uint32_t nLocal = partialFunction.function->getOutputVariableCount();
if (n == 0)
{
n = nLocal;
}
else if (n != nLocal)
{
throw PDFParserException(PDFParsingContext::tr("Functions in stitching function has different number of output variables."));
}
}
return std::make_shared<PDFStitchingFunction>(1, n, std::move(domain), std::move(range), std::move(partialFunctions));
}
else
{
throw PDFParserException(PDFParsingContext::tr("Stitching function has invalid functions."));
}
}
else
{
throw PDFParserException(PDFParsingContext::tr("Stitching function hasn't functions array."));
}
}
case 4:
{
@ -476,6 +544,21 @@ PDFFunction::FunctionResult PDFExponentialFunction::apply(PDFFunction::const_ite
return true;
}
PDFStitchingFunction::PDFStitchingFunction(uint32_t m, uint32_t n,
std::vector<PDFReal>&& domain,
std::vector<PDFReal>&& range,
std::vector<PDFStitchingFunction::PartialFunction>&& partialFunctions) :
PDFFunction(m, n, std::move(domain), std::move(range)),
m_partialFunctions(std::move(partialFunctions))
{
Q_ASSERT(m == 1);
}
PDFStitchingFunction::~PDFStitchingFunction()
{
}
PDFFunction::FunctionResult PDFStitchingFunction::apply(const_iterator x_1,
const_iterator x_m,
iterator y_1,